<template>
  <div class="ren-region">
    <el-input v-model="showName" :placeholder="placeholder" @focus="treeDialog">
      <el-button slot="append" icon="el-icon-search" @click="treeDialog"></el-button>
    </el-input>
    <el-input :value="value" style="display: none"></el-input>
    <el-dialog :visible.sync="visibleTree" width="360px" :modal="false" :title="placeholder"
               :close-on-click-modal="false" :close-on-press-escape="false">
      <el-form size="mini" :inline="true">
        <el-form-item :label="$t('keyword')">
          <el-input v-model="filterText"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button type="default">{{ $t('query') }}</el-button>
        </el-form-item>
      </el-form>
      <el-tree
          class="filter-tree"
          :data="dataList"
          :default-expanded-keys="expandedKeys"
          :props="{ label: 'name', children: 'children' }"
          :expand-on-click-node="false"
          :filter-node-method="filterNode"
          :highlight-current="true"
          node-key="id"
          ref="tree">
      </el-tree>
      <template slot="footer">
        <el-button type="default" @click="cancelHandle()" size="mini">{{ $t('cancel') }}</el-button>
        <el-button type="info" @click="clearHandle()" size="mini">{{ $t('clear') }}</el-button>
        <el-button type="primary" @click="commitHandle()" size="mini">{{ $t('confirm') }}</el-button>
      </template>
    </el-dialog>
  </div>
</template>
<style lang="scss">
.ren-region {
  .filter-tree {
    max-height: 230px;
    overflow: auto;
  }

  .el-dialog__body {
    padding: 0px 0px 0px 20px;
  }

  .el-dialog__footer {
    padding: 10px 20px 8px 20px;
  }
}
</style>
<script>
import {treeDataTranslate} from '@/utils'

export default {
  name: 'RenRegionTree',
  data() {
    return {
      filterText: '',
      visibleTree: false,
      dataList: [],
      showName: '',
      expandedKeys: null,
      defaultProps: {
        children: 'children',
        label: 'name'
      }
    }
  },
  props: {
    value: [Number, String],
    parentName: String,
    placeholder: String
  },
  watch: {
    filterText(val) {
      this.$refs.tree.filter(val)
    },
    parentName(val) {
      this.showName = val
    }
  },
  methods: {
    treeDialog() {
      this.expandedKeys = null
      if (this.$refs.tree) {
        this.$refs.tree.setCurrentKey(null)
      }
      this.visibleTree = true
      this.getDataList(this.value)
    },
    filterNode(value, data) {
      if (!value) return true
      return data.name.indexOf(value) !== -1
    },
    getDataList(id) {
      return this.$http.get('/sys/region/tree').then(({data: res}) => {
        if (res.code !== 0) {
          return this.$message.error(res.msg)
        }
        this.dataList = treeDataTranslate(res.data)
        this.$nextTick(() => {
          this.$refs.tree.setCurrentKey(id)
          this.expandedKeys = [id]
        })
      }).catch(() => {
      })
    },
    cancelHandle() {
      this.visibleTree = false
      this.dataList = []
      this.filterText = ''
    },
    clearHandle() {
      this.$emit('input', '0')
      this.$emit('update:parentName', '')
      this.showName = ''
      this.visibleTree = false
      this.dataList = []
      this.filterText = ''
    },
    commitHandle() {
      const node = this.$refs.tree.getCurrentNode()
      if (!node) {
        this.$message.error(this.$t('choose'))
        return
      }
      this.$emit('input', node.id)
      this.$emit('update:parentName', node.name)
      this.showName = node.name
      this.visibleTree = false
      this.dataList = []
      this.filterText = ''
    }
  }
}
</script>
